16 And it came to pass that I, Nephi, being exceedingly young, nevertheless being large in stature, and also having great desires to know of the mysteries of God, wherefore, I did cry unto the Lord; and behold he did visit me, and did soften my heart that I did believe all the words which had been spoken by my father; wherefore, I did not rebel against him like unto my brothers.
He was apparently torn. What his father had been saying had been so distant previously, but now the words were much closer to home, affecting his person on a deeper level, more personal level than ever before. Plus having to make the decision to follow the Lord's command and depart into the wilderness OR stay home in Jerusalem, where everything was familiar to him, would shake even the most valiant, fledgling soul. So he cried unto the Lord.